CN103682483B - A kind of lithium battery - Google Patents
A kind of lithium battery Download PDFInfo
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- CN103682483B CN103682483B CN201310635756.9A CN201310635756A CN103682483B CN 103682483 B CN103682483 B CN 103682483B CN 201310635756 A CN201310635756 A CN 201310635756A CN 103682483 B CN103682483 B CN 103682483B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
- H01M2010/4271—Battery management systems including electronic circuits, e.g. control of current or voltage to keep battery in healthy state, cell balancing
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Microelectronics & Electronic Packaging (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Secondary Cells (AREA)
Abstract
The present invention relates to a kind of lithium battery; comprise multiple lithium battery group; each lithium battery group is mutually close to by polylith lithium battery monomer (11) and is formed; be provided with metal coating plate (12) between the outer wall of adjacent two lithium battery groups, it is characterized in that: the direct voltage that each lithium battery group is undertaken between each lithium battery monomer by nondissipative equalization device is balanced.Lithium battery of the present invention changes tradition by the overall pattern of carrying out supplementary electricity to cell of Li-ion batteries piles, makes the energy content of battery directly flow to the low battery cell of voltage by the battery cell that voltage is high, thus has high efficiency charging and control simple advantage.
Description
Technical field
The present invention relates to a kind of lithium battery, especially relate to a kind of lithium battery of non-consuming equalizing circuit.
Background technology
A few days ago, due to the problem such as environment, the energy, ev industry development rapidly.Under normal circumstances, electric automobile uses the Li-ion batteries piles of series connection as its power source, or a part for power source, battery pack inconsistency in the course of the work constrains the release of its ceiling capacity, have impact on the dynamic property of electric motor car, shorten battery life, and the security incident such as heating, blast likely occurs, threaten the personal safety of electric motor car occupant and driver.Therefore, be necessary to the research of lithium-ion battery pack balancing system.
Electrical source of power voltage needed for electric automobile is at about 300V, and this just needs up to a hundred pieces of lithium ion battery series connection to use, sometimes in order to increase the energy that battery can provide, in parallel again after battery pack series connection.Due to the restriction of production and processing technical merit, the every characteristic of every block battery cell when dispatching from the factory can not be completely the same, and in use, battery behavior also can with many factors changes such as external environments, therefore, battery pack operationally certainly exists inconsistent problem.
The inconsistency of battery pack is embodied in the aspects such as voltage, internal resistance, dump energy, because the remaining capacity estimation technology (i.e. SOC estimate) of battery is a few days ago not yet ripe, the Standard General that we are carrying out the reference of battery pack balancing time institute is each cell voltage.Because battery pack series connection uses, its electric current when discharging is identical, and voltage is different.If we do not carry out battery pack balancing, and only monitor voltage, then reach lower battery pack in limited time at certain block cell voltage and just quit work, now, other batteries still can continue electric discharge, cause the waste of energy like this.Equally, during charging, a certain piece of cell voltage arrival upper limit just stops charging, and now other batteries are not yet full of, and are equivalent to decrease battery capacity.If carry out battery pack balancing, then each cell voltage synchronously changes,
During discharge and recharge battery be full of simultaneously, simultaneously emptying, make its capacity obtain maximum using, increase the continual mileage of electric motor car, reduce battery charging and discharging number of times, extend battery.
Equalizing system is classified
The method of battery balanced control is varied, and new method emerges in an endless stream, and adopts different criteria for classifications to produce different results.If press the topological structure classification of equalizing circuit, be then divided into centralized equilibrium and distributed equilibrium; If by the classification of balanced mechanism, then have charge balancing, equalization discharge and bidirectional equalization; By battery balanced standard, electric voltage equalization and SOC balance can be divided into; If by whether to battery with the angle protected of electric charge divide, then have dissipative equalization and nondissipative equalization.
1, dissipative equalization.
Dissipative equalization mode refers to that profit utilizes the modes such as parallel resistance to be fallen by the energy ezpenditure of battery more for electricity in battery pack, until its state-of-charge arrives mean value.
2, nondissipative equalization.
Nondissipative equalization refers to and utilizes the energy-storage travelling wave tube such as electric capacity, inductance to carry out energy trasfer between battery, makes the equalizing system that battery voltage is consistent.Energy conversion type equilibrium and balanced two kinds of energy trasfer formula can be divided into.
2.1, energy conversion type is balanced.
Energy conversion type equilibrium carries out supplementary electricity by Li-ion batteries piles entirety to cell by inverse excitation type converter, or carried out the balanced way that supplements to battery pack by cell.Power conversion balanced way can be divided into two kinds: the upper limit is balanced and lower limit is balanced.So-called upper limit equilibrium is exactly when the voltage of certain battery in battery pack is higher than average voltage, by transformer, energy back unnecessary for this battery is gone on whole battery pack.And lower limit equilibrium is when the voltage of certain battery is lower than average voltage, by transformer, energy is transformed into the battery of specifying from battery pack and gets on.Usually, upper limit equilibrium is used in charging process, and lower limit equilibrium is used in equalization discharge.
2.2, energy trasfer formula is balanced.
The equilibrium of energy trasfer formula is by using energy-storage travelling wave tube that energy is transferred to the low battery of voltage from the battery that voltage is high.This mode can use switching capacity to realize, and is transmitted the energy of adjacent cell by electric capacity, and electric charge is passed to the low battery of voltage to reach balanced from the battery that voltage is high.
As can be seen here, there is following technological deficiency in prior art:
(1) electric energy conversion has been become heat by dissipative equalization mode, and this balanced way causes a large amount of losses of energy, and the heat produced makes system temperature raise, and may cause safety problem and shorten battery life.
(2) the balanced powder mode of energy conversion type needs single battery to charge to whole battery module, efficiency and portfolio effect general not high, and control module complex structure.
(3) energy trasfer formula balanced way adopts the method for electric capacity or inductance to carry out energy trasfer, and this mode can only balanced adjacent cell electricity, and the speed of energy transferring depends on the voltage extent of adjacent cell, and phase speed is very slow after equalization.
Summary of the invention
The present invention devises a kind of lithium battery, its technical problem solved is that electric energy conversion has been become heat by (1) dissipative equalization mode, this balanced way causes a large amount of losses of energy, and the heat produced makes system temperature raise, and may cause safety problem and shorten battery life.(2) the balanced powder mode of energy conversion type needs single battery to charge to whole battery module, efficiency and portfolio effect general not high, and control module complex structure.(3) energy trasfer formula balanced way adopts the method for electric capacity or inductance to carry out energy trasfer, and this mode can only balanced adjacent cell electricity, and the speed of energy transferring depends on the voltage extent of adjacent cell, and phase speed is very slow after equalization.
In order to solve the technical problem of above-mentioned existence, present invention employs following scheme:
A kind of lithium battery; comprise multiple lithium battery group; each lithium battery group is mutually close to by polylith lithium battery monomer (11) and is formed; be provided with metal coating plate (12) between the outer wall of adjacent two lithium battery groups, it is characterized in that: the direct voltage that each lithium battery group is undertaken between each lithium battery monomer by nondissipative equalization device is balanced.
Further, described nondissipative equalization device comprises Multiple coil charging transformer, Multiple coil electric discharge transformer, charge balancing control switch, equalization discharge control switch, equalizer switch control module and iron core, two circuit are connected in parallel between every block lithium battery monomer (11) both positive and negative polarity, wherein a circuit is connected in series with Multiple coil charging transformer and charge balancing control switch, an other circuit is connected in series with Multiple coil electric discharge transformer and equalization discharge control switch; The balanced winding coil direction of winding of Multiple coil charging transformer and Multiple coil electric discharge transformer is contrary, and around circle on same iron core; Equalizer switch control module is for controlling disconnection and the conducting of each charge balancing control switch and each equalization discharge control switch.
Further, charge balancing control switch and equalization discharge control switch are made up of N-channel MOS field effect transistor and field effect transistor protective circuit, and N-channel MOS field effect transistor is driven by low limit.
Further, equalizer switch control module is made up of microprocessor, voltage detecting circuit and switch drive loop, equalizer switch control module produces low limit drive pulse signal, for controlling the N-channel MOS field effect transistor of charge balancing control switch and equalization discharge control switch; Equalizer switch control module control logic is in the microprocessor integrated.
This lithium battery, compared with traditional lithium battery, has following beneficial effect:
Lithium battery of the present invention changes tradition by the overall pattern of carrying out supplementary electricity to cell of Li-ion batteries piles, makes the energy content of battery directly flow to the low battery cell of voltage by the battery cell that voltage is high, thus has high efficiency charging and control simple advantage.
Accompanying drawing explanation
Fig. 1: the first structural representation of lithium battery of the present invention;
Fig. 2: lithium battery the second structural representation of the present invention;
Fig. 3: the third structural representation of lithium battery of the present invention;
Fig. 4: the nondissipative equalization apparatus structure schematic diagram of lithium battery of the present invention;
Fig. 5: the battery cell electric discharge schematic diagram of lithium battery of the present invention;
Fig. 6: the battery cell charging schematic diagram of lithium battery of the present invention.
Description of reference numerals:
11-lithium battery monomer; 12-metal coating plate; 13-fixture;
21-housing; 22-lithium battery monomer; 23-metal catheter; 24-thermal conducting sleeve;
31-protective circuit plate; 32-lithium battery anode; 33-negative pole nickel strap; 34-battery core cathode pole piece nickel strap; 35-positive pole aluminium strip; 36-plastic cement battery core cover plate; 37-battery core anode pole piece nickel strap; 38-plastic casing; 39-battery pole piece core; 310-negative pole nickel strap goes between; 311-battery cathode.
Embodiment
Below in conjunction with Fig. 1 to Fig. 6, the present invention will be further described:
Embodiment 1: as shown in Figure 1, a kind of lithium battery, comprises two lithium battery groups, and two lithium battery groups are all mutually be close to by two pieces of lithium battery monomers 11 to form, and the outer wall of each lithium battery group is provided with metal coating plate 12.Often the lithium battery monomer 11 organized in lithium battery group can increase according to actual conditions, and lithium battery group also can increase according to actual conditions.Metal coating plate 12 to be fixed by the fixture 13 being arranged on aluminium sheet edge by two blocks of aluminium sheets to form.Fixture 13 can be rivet.
Lithium battery of the present invention fixes lithium battery monomer 11 utilizing the aluminium sheet of metal coating plate 12 particularly high heat radiation; not only can realize polylith lithium battery monomer 11 to use simultaneously; for power consumption equipment provides lasting flying power and powerful electric energy; and its radiating efficiency is also very high, even if polylith lithium battery monomer 11 uses also there will not be the too high phenomenon causing lithium battery 1 to be burned of temperature simultaneously.
In addition, as shown in Figure 4, the present invention also comprises nondissipative equalization device, and the direct voltage that each lithium battery group is undertaken between each lithium battery monomer by nondissipative equalization device is balanced.
Nondissipative equalization device comprises Multiple coil charging transformer, Multiple coil electric discharge transformer, charge balancing control switch, equalization discharge control switch, equalizer switch control module and iron core, two circuit are connected in parallel between every block lithium battery monomer 11 both positive and negative polarity, wherein a circuit is connected in series with Multiple coil charging transformer and charge balancing control switch, an other circuit is connected in series with Multiple coil electric discharge transformer and equalization discharge control switch; The balanced winding coil direction of winding of Multiple coil charging transformer and Multiple coil electric discharge transformer is contrary, and around circle on same iron core; Equalizer switch control module is for controlling disconnection and the conducting of each charge balancing control switch and each equalization discharge control switch.
Charge balancing control switch and equalization discharge control switch are made up of N-channel MOS field effect transistor and field effect transistor protective circuit, and N-channel MOS field effect transistor is driven by low limit.
Equalizer switch control module is made up of microprocessor and switch drive loop, and equalizer switch control module produces low limit drive pulse signal, for controlling the N-channel MOS field effect transistor of charge balancing control switch and equalization discharge control switch; Equalizer switch control module control logic is in the microprocessor integrated.
As shown in Figure 4, lithium battery monomer C4 is that voltage is the highest, and lithium battery monomer C2 is that voltage is minimum, and voltage difference scope meets the unbalanced condition limit value of battery, and balancing procedure is activated.
As shown in Figure 5, equalization discharge control switch S8 closes, and electric current flows out from lithium battery monomer C4, and by electrical power storage in Multiple coil electric discharge transformer L8.
After Multiple coil electric discharge transformer L8 discharge process terminates, equalization discharge control switch S8 disconnects.Equalization discharge control switch S8 disconnects moment, and Multiple coil electric discharge transformer L8 coil current reduces to zero, and discharging in the contrary coil of transformer L8 direction of winding with Multiple coil produces inverse electromotive force.
As shown in Figure 6, while disconnecting equalization discharge control switch S8, closed by the charge balancing control switch S3 of minimum for voltage lithium battery monomer C2, equalization discharge control switch S8 disconnects the inverse electromotive force produced instantaneously and is delivered in C4 by the energy in Multiple coil charging transformer L3 coil.
The operation principle of nondissipative equalization device of the present invention is as follows:
The voltage of each monomer in the microprocessor of equalizer switch control module and voltage detecting circuit Real-time Collection lithium battery group, and the most high monomer voltage calculated in battery pack and minimum monomer voltage.
The equalization discharge control switch conducting of the highest lithium battery monomer of Microprocessor S3C44B0X voltage of equalizer switch control module, by electric energy transfer in Multiple coil electric discharge Transformer Winding; Then the equalization discharge control switch of this ceiling voltage lithium battery monomer disconnects, the charging control switch conducting of the minimum lithium battery monomer of voltage, ceiling voltage lithium battery monomer Multiple coil electric discharge transformer by iron core by energy trasfer on the Multiple coil charging transformer of the minimum lithium battery monomer of voltage, energy in last Multiple coil charging transformer is added in this minimum voltage lithium battery monomer, completes a charge and discharge process.
The microprocessor of equalizer switch control module continues to detect monomer voltage, as met equilibrium condition, reopens a balancing procedure; If do not met equilibrium condition, no longer carry out balancing procedure.
Embodiment 2: as shown in Figure 2, the invention provides a kind of in be provided with the lithium battery of metal catheter, be made up of with metal catheter 23 housing 21, lithium battery monomer 22, lithium battery monomer 22 is arranged in the inner chamber of housing 21.The quantity of metal catheter 23 is two, and two metal catheters 23 are through in thermal conducting sleeve 24, and this thermal conducting sleeve 24 is also through inside with housing 21 of lithium battery monomer 22.Multiple metal catheter 23 is set in a thermal conducting sleeve 24, is also convenient to manage multiple metal catheter 23, metal catheter 23 can not be subjected to displacement in lithium battery monomer 22 with housing 21.Multiple lithium battery monomer 22 is combined into lithium battery group.
In addition, multiple through hole is also distributed with by the tube wall surface at metal catheter 23, the heat produced in lithium battery monomer 22 and housing 21 inner chamber can import metal catheter by multiple through holes of metal catheter 23 surface distributed, is then exported the outside to housing by metal catheter.The present invention utilizes the metal catheter 23 in lithium battery monomer 22 to carry out the feature of heat conduction, conduction and ventilation, thus play the effect of deriving lithium battery monomer 22 center heat, be conducive to heat radiation, shorten collector electrode, reduce internal resistance, reduce the effect such as hear rate, balancing battery internal pressure.
In addition, as shown in Figure 4, the present invention also comprises nondissipative equalization device, and the direct voltage that each lithium battery group is undertaken between each lithium battery monomer by nondissipative equalization device is balanced.
Nondissipative equalization device comprises Multiple coil charging transformer, Multiple coil electric discharge transformer, charge balancing control switch, equalization discharge control switch, equalizer switch control module and iron core, two circuit are connected in parallel between every block lithium battery monomer 11 both positive and negative polarity, wherein a circuit is connected in series with Multiple coil charging transformer and charge balancing control switch, an other circuit is connected in series with Multiple coil electric discharge transformer and equalization discharge control switch; The balanced winding coil direction of winding of Multiple coil charging transformer and Multiple coil electric discharge transformer is contrary, and around circle on same iron core; Equalizer switch control module is for controlling disconnection and the conducting of each charge balancing control switch and each equalization discharge control switch.
Charge balancing control switch and equalization discharge control switch are made up of N-channel MOS field effect transistor and field effect transistor protective circuit, and N-channel MOS field effect transistor is driven by low limit.
Equalizer switch control module is made up of microprocessor and switch drive loop, and equalizer switch control module produces low limit drive pulse signal, for controlling the N-channel MOS field effect transistor of charge balancing control switch and equalization discharge control switch; Equalizer switch control module control logic is in the microprocessor integrated.
As shown in Figure 4, lithium battery monomer C4 is that voltage is the highest, and lithium battery monomer C2 is that voltage is minimum, and voltage difference scope meets the unbalanced condition limit value of battery, and balancing procedure is activated.
As shown in Figure 5, equalization discharge control switch S8 closes, and electric current flows out from lithium battery monomer C4, and by electrical power storage in Multiple coil electric discharge transformer L8.
After Multiple coil electric discharge transformer L8 discharge process terminates, equalization discharge control switch S8 disconnects.Equalization discharge control switch S8 disconnects moment, and Multiple coil electric discharge transformer L8 coil current reduces to zero, and discharging in the contrary coil of transformer L8 direction of winding with Multiple coil produces inverse electromotive force.
As shown in Figure 6, while disconnecting equalization discharge control switch S8, closed by the charge balancing control switch S3 of minimum for voltage lithium battery monomer C2, equalization discharge control switch S8 disconnects the inverse electromotive force produced instantaneously and is delivered in C4 by the energy in Multiple coil charging transformer L3 coil.
The operation principle of nondissipative equalization device of the present invention is as follows:
The voltage of each monomer in the microprocessor of equalizer switch control module and voltage detecting circuit Real-time Collection lithium battery group, and the most high monomer voltage calculated in battery pack and minimum monomer voltage.
The equalization discharge control switch conducting of the highest lithium battery monomer of Microprocessor S3C44B0X voltage of equalizer switch control module, by electric energy transfer in Multiple coil electric discharge Transformer Winding; Then the equalization discharge control switch of this ceiling voltage lithium battery monomer disconnects, the charging control switch conducting of the minimum lithium battery monomer of voltage, ceiling voltage lithium battery monomer Multiple coil electric discharge transformer by iron core by energy trasfer on the Multiple coil charging transformer of the minimum lithium battery monomer of voltage, energy in last Multiple coil charging transformer is added in this minimum voltage lithium battery monomer, completes a charge and discharge process.
The microprocessor of equalizer switch control module continues to detect monomer voltage, as met equilibrium condition, reopens a balancing procedure; If do not met equilibrium condition, no longer carry out balancing procedure.
Embodiment 3: as shown in Figure 3; present embodiment discloses a kind of lithium battery; comprise the shell of lithium battery monomer and encapsulation lithium battery monomer, be also provided with a protective circuit plate 31 in the enclosure, protective circuit plate 31 is connected to protect lithium battery with the positive pole of lithium battery monomer with negative electricity.Multiple lithium battery set of monomers synthesis lithium battery group.
Shell comprises tubbiness plastic casing 38 and plastic cement cover plate 36, and plastic casing 38 and plastic cement cover plate 36 mutually fasten and be encapsulated in wherein by lithium battery monomer.
Lithium battery monomer comprises battery pole piece core 39, battery core cathode pole piece nickel strap 34, battery core anode pole piece nickel strap 37, negative pole nickel strap 33, positive pole aluminium strip 35, anode 32, battery cathode 311 and negative pole nickel strap lead-in wire 310.Battery pole piece core 39 and battery core cathode pole piece nickel strap 34, negative pole nickel strap 33, negative pole nickel strap go between 310 and battery cathode 311 negative pole of drawing this lithium battery that is cascaded export; Described battery pole piece core 39 and battery core anode pole piece nickel strap 37, positive pole aluminium strip 35, anode 32 positive pole of drawing this lithium battery that is cascaded exports.
Its manufacture method of lithium battery of the present invention, comprises the steps:
(1) injection molding machine is utilized to produce tubbiness plastic casing 38 and plastic cement battery core cover plate 36;
(2) battery core pole piece core 39 is inserted in the staving of plastic casing 38;
(3) by ultra-sonic welded or resistance welded mode; the battery core cathode pole piece nickel strap 34 of battery core pole piece core 39 is welded with the battery core cathode pole piece nickel strap 33 inlayed in plastic cement battery core cover plate 36, and the battery core anode pole piece nickel strap 37 of battery core pole piece core 39 is welded with the positive pole aluminium strip 35 inlayed in plastic cement battery core cover plate 36;
(4) plastic cement battery core cover plate 36 is bumped in plastic casing 38;
(5) plastic cement battery core cover plate 36 and plastic casing 38 are passed through together with laser welding;
(6) fluid injection, sealing, charging are carried out to this lithium battery;
(3) connect and fix protective circuit plate 31.
Protective circuit plate together with lithium battery encapsulation, make the present invention be provided with the function of battery protecting circuit, and then it is convenient that the present invention is used by the present invention simultaneously.
In addition, as shown in Figure 4, the present invention also comprises nondissipative equalization device, and the direct voltage that each lithium battery group is undertaken between each lithium battery monomer by nondissipative equalization device is balanced.
Nondissipative equalization device comprises Multiple coil charging transformer, Multiple coil electric discharge transformer, charge balancing control switch, equalization discharge control switch, equalizer switch control module and iron core, two circuit are connected in parallel between every block lithium battery monomer 11 both positive and negative polarity, wherein a circuit is connected in series with Multiple coil charging transformer and charge balancing control switch, an other circuit is connected in series with Multiple coil electric discharge transformer and equalization discharge control switch; The balanced winding coil direction of winding of Multiple coil charging transformer and Multiple coil electric discharge transformer is contrary, and around circle on same iron core; Equalizer switch control module is for controlling disconnection and the conducting of each charge balancing control switch and each equalization discharge control switch.
Charge balancing control switch and equalization discharge control switch are made up of N-channel MOS field effect transistor and field effect transistor protective circuit, and N-channel MOS field effect transistor is driven by low limit.
Equalizer switch control module is made up of microprocessor and switch drive loop, and equalizer switch control module produces low limit drive pulse signal, for controlling the N-channel MOS field effect transistor of charge balancing control switch and equalization discharge control switch; Equalizer switch control module control logic is in the microprocessor integrated.
As shown in Figure 4, lithium battery monomer C4 is that voltage is the highest, and lithium battery monomer C2 is that voltage is minimum, and voltage difference scope meets the unbalanced condition limit value of battery, and balancing procedure is activated.
As shown in Figure 5, equalization discharge control switch S8 closes, and electric current flows out from lithium battery monomer C4, and by electrical power storage in Multiple coil electric discharge transformer L8.
After Multiple coil electric discharge transformer L8 discharge process terminates, equalization discharge control switch S8 disconnects.Equalization discharge control switch S8 disconnects moment, and Multiple coil electric discharge transformer L8 coil current reduces to zero, and discharging in the contrary coil of transformer L8 direction of winding with Multiple coil produces inverse electromotive force.
As shown in Figure 6, while disconnecting equalization discharge control switch S8, closed by the charge balancing control switch S3 of minimum for voltage lithium battery monomer C2, equalization discharge control switch S8 disconnects the inverse electromotive force produced instantaneously and is delivered in C4 by the energy in Multiple coil charging transformer L3 coil.
The operation principle of nondissipative equalization device of the present invention is as follows:
The voltage of each monomer in the microprocessor of equalizer switch control module and voltage detecting circuit Real-time Collection lithium battery group, and the most high monomer voltage calculated in battery pack and minimum monomer voltage.
The equalization discharge control switch conducting of the highest lithium battery monomer of Microprocessor S3C44B0X voltage of equalizer switch control module, by electric energy transfer in Multiple coil electric discharge Transformer Winding; Then the equalization discharge control switch of this ceiling voltage lithium battery monomer disconnects, the charging control switch conducting of the minimum lithium battery monomer of voltage, ceiling voltage lithium battery monomer Multiple coil electric discharge transformer by iron core by energy trasfer on the Multiple coil charging transformer of the minimum lithium battery monomer of voltage, energy in last Multiple coil charging transformer is added in this minimum voltage lithium battery monomer, completes a charge and discharge process.
The microprocessor of equalizer switch control module continues to detect monomer voltage, as met equilibrium condition, reopens a balancing procedure; If do not met equilibrium condition, no longer carry out balancing procedure.
Claims (2)
1. a lithium battery, comprise multiple lithium battery group, each lithium battery group is mutually close to by polylith lithium battery monomer (11) and is formed, be provided with metal coating plate (12) between the outer wall of adjacent two lithium battery groups, it is characterized in that: the direct voltage that each lithium battery group is undertaken between each lithium battery monomer by nondissipative equalization device is balanced; Described nondissipative equalization device comprises Multiple coil charging transformer, Multiple coil electric discharge transformer, charge balancing control switch, equalization discharge control switch, equalizer switch control module and iron core, two circuit are connected in parallel between every block lithium battery monomer (11) both positive and negative polarity, wherein a circuit is connected in series with Multiple coil charging transformer and charge balancing control switch, an other circuit is connected in series with Multiple coil electric discharge transformer and equalization discharge control switch; The balanced winding coil direction of winding of Multiple coil charging transformer and Multiple coil electric discharge transformer is contrary, and around circle on same iron core; Equalizer switch control module is for controlling disconnection and the conducting of each charge balancing control switch and each equalization discharge control switch; The voltage of each monomer in the microprocessor of equalizer switch control module and voltage detecting circuit Real-time Collection lithium battery group, and the most high monomer voltage calculated in battery pack and minimum monomer voltage; The equalization discharge control switch conducting of the highest lithium battery monomer of Microprocessor S3C44B0X voltage of equalizer switch control module, by electric energy transfer in Multiple coil electric discharge Transformer Winding; Then the equalization discharge control switch of this ceiling voltage lithium battery monomer disconnects, the charge balancing control switch conducting of the minimum lithium battery monomer of voltage, ceiling voltage lithium battery monomer Multiple coil electric discharge transformer by iron core by energy trasfer on the Multiple coil charging transformer of the minimum lithium battery monomer of voltage, energy in last Multiple coil charging transformer is added in this minimum voltage lithium battery monomer, completes a charge and discharge process.
2. lithium battery according to claim 1, is characterized in that: charge balancing control switch and equalization discharge control switch are made up of N-channel MOS field effect transistor and field effect transistor protective circuit, and N-channel MOS field effect transistor is driven by low limit.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310635756.9A CN103682483B (en) | 2013-12-03 | 2013-12-03 | A kind of lithium battery |
| CN201510760207.3A CN105206884A (en) | 2013-12-03 | 2013-12-03 | Lithium battery |
| CN201510759424.0A CN105244552A (en) | 2013-12-03 | 2013-12-03 | Lithium battery |
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| CN201310635756.9A CN103682483B (en) | 2013-12-03 | 2013-12-03 | A kind of lithium battery |
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| CN107251363B (en) * | 2015-12-31 | 2020-09-29 | 深圳市大疆创新科技有限公司 | Method and system for balancing battery assembly |
| CN107039687A (en) * | 2016-02-04 | 2017-08-11 | 北京波士顿动力电池有限公司 | A kind of non-dissipative equalizing circuit for electric automobile power battery |
| CN106252553B (en) * | 2016-08-29 | 2018-12-18 | 东莞力朗电池科技有限公司 | A kind of dsc data acquisition Intelligent current regulating cell case of replaceable battery unit |
| CN106571659A (en) * | 2016-10-20 | 2017-04-19 | 中山大学 | Two-stage balanced charging system and method for power battery pack management |
| CN106532829A (en) * | 2016-11-29 | 2017-03-22 | 河南科技大学 | Two-stage balance control circuit, system and policy for charge and discharge of lithium battery packs |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2627660Y (en) * | 2002-10-09 | 2004-07-21 | 河南环宇集团有限公司 | High-power polymer lithium ion electrokinetic cell and cooling composite structure thereof |
| CN2899130Y (en) * | 2005-08-03 | 2007-05-09 | 郭文成 | Equalizing controller of series battery set |
| US20120019156A1 (en) * | 2010-07-22 | 2012-01-26 | Microsemi Corporation | Led string driver with non-dissipative reactance balancer |
| CN102593503B (en) * | 2011-01-06 | 2015-08-19 | 广州七喜工控科技有限公司 | Inside be provided with the lithium battery of metal catheter |
| CN202231461U (en) * | 2011-09-15 | 2012-05-23 | 金华职业技术学院 | Charge-discharge balance control system for power battery pack |
| CN102832653B (en) * | 2011-12-29 | 2015-09-30 | 中航锂电（洛阳）有限公司 | The how monomer series-connected active equalizer circuit of cell pack of one |
| CN202856386U (en) * | 2012-07-31 | 2013-04-03 | 刘阶萍 | Charge-discharge active equalizing smart battery module and system |
| CN203013839U (en) * | 2012-12-11 | 2013-06-19 | 海芝通电子(深圳)有限公司 | Novel lithium battery structure |
| CN103117577B (en) * | 2013-02-04 | 2015-10-28 | 杭州高特电子设备有限公司 | Energy balance circuit for battery pack of electric vehicle |
-
2013
- 2013-12-03 CN CN201510759424.0A patent/CN105244552A/en active Pending
- 2013-12-03 CN CN201310635756.9A patent/CN103682483B/en not_active Expired - Fee Related
- 2013-12-03 CN CN201510760207.3A patent/CN105206884A/en active Pending
Also Published As
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|---|---|
| CN105244552A (en) | 2016-01-13 |
| CN103682483A (en) | 2014-03-26 |
| CN105206884A (en) | 2015-12-30 |
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